Air-cleaning device for the air-inlet apertures of carburetors of automotive vehicles



C. E. JOHNSON AIR CLEANING DEVICE FOR .THE AIR INLET APEHTURES OF CARBURETORS OF AUTOMOTIVE VEHICLES Filed Oct. 19, 1923 ill JQHNSGNOE DENVER, GOLURADG.

FJIEVIQYE EBR AER-BILLET .ZaPERTURES 9F GARBURIETORS OF AUTQIIIUTIVE VEHICLES.

Application filed @cto'ner 1.9, 1823. Serial Nc. 669,632.

To all whom it may concern: Be it known that l, CHARLES E. JOHNSON, a. citizen of the United States of America,

. residing at the city and county of Denver and State of Uolomdo, have invented a. new and useful Air-Cleaning Device for the Airlnlet Apertures of Carburetors of Automotivev Vehicles, of which the following is a specification. 9

My invention relates to an air cleaning device lo the ail inlet apertures of carburetors of automotive vehicles.

And the objects of my invention are:

First. To provide a. multiple arrangement of spiral planes that receive atmospheric air through the medium of the suction strokes of the engine of an automotive machine actl g through the curburetor and automatically separates from the air, as it passes through it, the dust, grit, sand or bits of leavesv other matterthat blows into the engine space undertlie hoods and against the engines and carburetors of automotive vehicles as they travel over roads, and that delivers clean air to the air inlet of their carburetors.

Second. To provide a stationary-air cleans ing device that can be attached directly to the air inlets of carburetors, that occupies very little space under the hood of the en gins, and that is inexpensive to make and that is arranged to receive air flowing into the space under the hood around the engine through t is radiator and openings in the hood, or to receive air heated by the exhaust manifold of the engine, and to deliver clean, hot or cool air to the carburetor.

Third. To provide a cooperating and. co acting'group of helical O1 spirally arranged air passageways that receive air simultaneousl into several independent passageways at t e furtliecmost end oi"- the device from the carburetor, and conduct it concentrically around a.- common axis in spiral paths arranged at squidistances apart. and discharge it simultaneously into the air intake a oe?- ture of a. carburetor to which my air purifying device is connected, the construction of the spiral passageways being so arranged that the particles of dust, dirt, sand, etc, that are heavier than clean air are separated remit and are discharged from the spiral passageways and the device, while the clean air flows into the carburetor.

l attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 1s a front View of a. portion of an-eutomobile engine, having a carburetor I attached thereto, and showing the improved on cleaning device connected with said carburetor and with an air inlet pipe.

ings which separate the 0 caused air from,

that carrying the foreign substances. And

liigures 5 and 6 are respectively a. plan and a side view of a single helix, showing the-radial spacing tongues as they appear before the circumferential edge portion of the helix has been upturned.

Referring to the accompanying drawings:

The numeral 1 refers to a. portion of an automobile engine, and 2, to a. carburetor which is operatively secured thereto, the improved air cleaner being adapted. for use in connection with any of the various styles of carburetors in present use.

The improved device comprises the cleanea' proper and a housing or casing surrounding the same, which is constructed and arranged as follows: The housing 3 is cylindrical in :1

form and is closed at each end by a cap 4;. each having an axial opening 5. .A short air inlet tube or pipe 6 is see red in the opening of the upper cap, and an outlet pipe 7 is secured in the opening of the opposite cap, or the outlet pipe may be in the form of an elbow 8 as shown ,ifi Fi 'ure 1, the other end of which is connected to the air. inlet 9 of the carburetor: Theair inlet pipe 6 may terminate at any distance from the housing 3, or as shown, it may lecoimectct'. by a pipe 10 with a sleeve 11 which sur rounds, but is spaced from, the exhaust pipe 12 of the engine, whereby hot to the carburetor.

The air cleaner proper mayconsist of a air is supplied.

single helix, but 1 preferably employ two".-

lielixes 13 and 1a, and turn or screw one within. the other so as to form a double helix, and therefore a. double air passagel cumference of the disk. Then,

voutiom/and by riveting or soldering twoeu'chhelixes' together, a helix of 'two complete convolutions is formed, as will be undone by Figin'e 6, such a. helix providing a sufiicient number of convolutions'for the purpose required, though a. helix hav-' ing a greater number of convolutions may be employed if desired In oonnectin two disks, the lower radial edge of one isk is caused to overlap the upper radial edge of the other disk, as shown by the dotted line at X in Figure 6, and the overlapping edges aresecured to other as above mentioned.-

disk is ormed with integral radial tongues 17 which project from its circumferential edge as shown in "Figure 5, and this edge portion is upturned on the dotted line 18 to provide a narrow circumferential wall or flan e 19, which taken with the body. of the di forms a circular gutter, around which the foreign substances such as, heavy dust and grit are carried by the whirling current of air, as will presently be more fully explained.

After fiormlng two helixesin the manner above described, they are assembled to form I lower end portion 0' the wall of the hous-' a double helix, by turning or twisting them to lie one Within the other, as shown inFigare 2, the convolutionsof the two helixes being properly spaced with res sot to each other and maintained in pa, lel relation throughout, by the tongues 17 'of each helix which supports the (nnvolutions or wind ings of the other helix as clearly shown in the drawings. In assembling thetwo helixes, it is preferable to arrange them with their terminals extending in diametrically opposite directions, and thus arranged, they are placed in the housing 3, which fits tightly around them, and they may be held against turning, soldering them to the casing at one or more points.

It will thus be seen that the double helix, taken in connection with the. wall of the housing 3, forms two-independent winding air passages at 20 and 20 respectivel and discharge it at 20 and 20 respectively.

An outlet openin 22 is formed in the ing at the point where the helix 13 termihatch, and an outlet opening 23 is formed at 'a diametrically opposite point in the and grit-laden air, represented Patent, is:

- the convolutions of the two helixes, said intense housing where the helix 14 terminates. A. vertically, disposed metal deflecting or divid ing strip 24 of suitable length is secured in the outlet portion of the air passage 20, the outer end of the strip being secured to the wall of the housing at the point where the helix 13 terminates, and a similar strip 25 is placed in the outlet portion-of the sea e 21, its outer end being secured to til wa oi the housing at the point where the helix 14 terminates. These strips fit tightly be tween the two convolutions and serve to di vide the air as it discharges from each pas sage, so that part of mean will difcharge through the outlet openings 22 and?! and the remainder will discharge into the cusing. A rod orstemfliiis u h the axial opening extending 1; non hithe ouble/ helix, thereby to close the opening.

in practice the improved air cleaning def vice is arranged as shown in Figure 1, or w as to connect its outlet ipe 7 with theintae of the carburetor, and when the originals started, air is drawn, by suction through the pipe 10 into the housing 3 and enters the passages 20 and 21 at 20 and 20, and is given a swirling motion by the. passages, whereby. the heavy dust and grit andother forei n'substances in the air are thrown outward by centrifugal force and settle in the gutter at the marginal edge of each helix, and are finally discharged through the outlet holes 22 and 23 in the housing. v

The deflectors 2t and 25 separate the dust by the arrows Y, from the clean' air, as the dirtladen air hugs the wall of the housing in its passage throu h the cleaner, and, therefore, is prevented y the. said deflectors from discharging into, the housing, while the clean air, represented by the arrows Z, is

discharged into the housing, and passes thence through the elbow 8 into the carbu-v retor. a H

By the employment of the improved dc vice, air relieved of practically all foreign 'matter is delivered to the carburetor, thereby materially preventing clogging in the carburetor and the entrance of grit in the cylinders, and thus contributing to the general efficiency of the engine. I

- Having described my invention, what I claim is new and desire to by Letters A dust cleaner ofthe character described,

comprising a double helix, each havmg a 20 and 21, which take the air marginal, upturned flange, and upright tongues on said flange which serve to space helixes terminating at diametrically .opposite points, a. casing tightly surrounding said hclixes and having outlet openings in line with the terminal ends of said helixcs, said casing having "an inlet ope 'ng to the atml mosphere and m miblet adapted to 'be connected with the inlet of a carburetor, said helixes formin a double air passage throu'gh said casing, vertically disposed pm:-

' titions in the discharge terminal portions of said passages which separate ihe out-lets leading to the atmosphere from the interior of the ceasing and are adapted to divide the ,air as it leaves the paesagw, so that part of said air is discharged into saiei easing anti then drawn intothe carburetor, the fereign maiter in the sin being thi'ovm euizwa-mi by rentrifugai fdi'c-e, is carried around the marginei portions of the heiixes and discharged through the outlet openings in said casing 15 leading ts the atmosphere.

In testimony whereef I afiix my signature in presence of two Witnesses.

GHARL'ES E. JOHNSGN. Witnesses:

Gr. SARGENT ELLIOTT, ELIZABETH SMITH. 

